Seat assembly



FIG. 1 is a perspective view of the seat assembly on a stool showing a right side, a top and a front.

FIG. 2 is a top plan view of the seat assembly of FIG. 1.

FIG. 3 is a front elevational view.

FIG. 4 is a rear elevational view.

FIG. 5 is a left side elevational view, the right side being a mirror image; and,

FIG. 6 is a bottom plan view.

The broken line showings of the mounting portions and the ribs of the seat assembly form no part of the claimed design. The broken line showing of a portion of the stool illustrates the environment of the claimed design and forms no part thereof 

CLAIM We claim the ornamental design for a seat assembly, as shown and described. 